subscriber preferences

Hi! I am using Squarespace campaigns to send out newsletters people who enrolled to my mailing list. I am looking for away to allow the subscribers to chose what information they want to receive, meaning that the subscriber can choose preferences - do they want to get weekly updates about live events, or just once in a while update when a new course is released. I understand that Squarespace don't have an option for subscriber preferences at the moment, I wonder if anyone here have a creative solution?

Following - looking for the same thing!

Same I'm looking for this feature. I have subscribers who would unsubscribe if I send them special promotions etc. they're there for the content and I don't want to loose them via, say, a Christmas promotion